[Bug 280942] amdsmn(4), amdtemp(4): add support for AMD Family 19h Models 10h-1Fh.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280942

            Bug ID: 280942
           Summary: amdsmn(4), amdtemp(4): add support for AMD Family 19h
                    Models 10h-1Fh.
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: olli@FreeBSD.org

Created attachment 252943
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=252943&action=edit
Patch for amdsmn.c and amdtemp.c to support AMD Ryzen 7 "Phoenix"

The attached patch adds support for AMD Ryzen 7 "Phoenix" processors (family
0x19, model 0x70-0x7f) to the amdsmn(4) and amdtemp(4) drivers, enabling
temperature readings of these CPUs via sysctl. The sensors work the same as for
the "Raphael" processors (model 0x60-0x6f), only the PCI device ID differs.

The patch applies cleanly to (15-) current, 14-stable and 13-stable, including
14.1-RELEASE and 13.4-BETA. However, I have *not* tested it on 13, but I'm
fairly certain that it works there, too (as explained above, it's only the PCI
device ID).

Tested with Ryzen 7 8700G (family 0x19, model 0x75).
Kernel messages:

CPU: AMD Ryzen 7 8700G w/ Radeon 780M Graphics       (4200.20-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0xa70f52  Family=0x19  Model=0x75  Stepping=2
[...]
amdsmn0: <AMD Family 19h System Management Network> on hostb0
amdtemp0: <AMD CPU On-Die Thermal Sensors> on hostb0

$ sysctl dev.amdtemp
dev.amdtemp.0.core0.sensor0: 32.1C
dev.amdtemp.0.sensor_offset: 0
dev.amdtemp.0.%parent: hostb0
dev.amdtemp.0.%pnpinfo: 
dev.amdtemp.0.%location: 
dev.amdtemp.0.%driver: amdtemp
dev.amdtemp.0.%desc: AMD CPU On-Die Thermal Sensors
dev.amdtemp.%parent: 

$ sysctl dev.cpu.0
dev.cpu.0.temperature: 32.1C
dev.cpu.0.cx_method: C1/hlt C2/io C3/io
dev.cpu.0.cx_usage_counters: 931437 0 0
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% last 1557us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/18 C3/3/350
dev.cpu.0.freq_levels: 4200/5040 2200/2420 1600/1600
dev.cpu.0.freq: 1600
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=ACPI0007 _UID=0 _CID=none
dev.cpu.0.%location: handle=\_SB_.PLTF.C000
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU

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